How to make a bevel on text
You can use curve bevel it is not an automatic one-click-solve-all solution, it will lead to artifacts in narrower zones and cause artifacts in pointy tips.



In fonts or curves with width variations it will never yield a perfectly triangular bevel like the Gibson logo.

You can tweak it locally, but that will always require manual adjustment and modeling.



For these types of complex shapes you best bet is really converting to mesh with a proper topology and manually modeling it. Triangulated mesh from raw curve to mesh conversion will not do.